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Added BeginPopupContextItem() comment (#439)

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ocornut 2015-12-21 00:04:33 +01:00
parent 6102aa1375
commit 4723d97cfb
2 changed files with 13 additions and 8 deletions
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13
imgui.cpp
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@ -3207,7 +3207,7 @@ void ImGui::CloseCurrentPopup()
ClosePopupToLevel(popup_idx);
}
static void ClearSetNextWindowData()
static inline void ClearSetNextWindowData()
{
ImGuiState& g = *GImGui;
g.SetNextWindowPosCond = g.SetNextWindowSizeCond = g.SetNextWindowContentSizeCond = g.SetNextWindowCollapsedCond = g.SetNextWindowFocus = 0;
@ -3282,11 +3282,16 @@ void ImGui::EndPopup()
ImGui::PopStyleVar();
}
// FIXME: Allow to reopen existing, would need to a/ read DC.LastItemHoveredRect instead of DC.LastItemHoveredAndUsable and b/ add parameter to API (more tricky)
// This is a helper to handle the most simple case of associating one named popup to one given widget.
// 1. If you have many possible popups (for different "instances" of a same widget, or for wholly different widgets), you may be better off handling
// this yourself so you can store data relative to the widget that opened the popup instead of choosing different popup identifiers.
// 2. If you want right-clicking on the same item to reopen the popup at new location, use the same code replacing IsItemHovered() with IsItemHoveredRect().
// Because: hovering an item in a window below the popup won't normally trigger is hovering behavior/coloring. The pattern of ignoring the fact that
// the item isn't interactable (because it is blocked by the active popup) may useful in some situation when e.g. large canvas as one item, content of menu
// driven by click position.
bool ImGui::BeginPopupContextItem(const char* str_id, int mouse_button)
{
ImGuiWindow* window = GetCurrentWindowRead();
if (window->DC.LastItemHoveredAndUsable && ImGui::IsMouseClicked(mouse_button))
if (ImGui::IsItemHovered() && ImGui::IsMouseClicked(mouse_button))
ImGui::OpenPopupEx(str_id, false);
return ImGui::BeginPopup(str_id);
}

8
imgui.h
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@ -352,9 +352,9 @@ namespace ImGui
IMGUI_API void OpenPopup(const char* str_id); // mark popup as open. popups are closed when user click outside, or activate a pressable item, or CloseCurrentPopup() is called within a BeginPopup()/EndPopup() block. popup identifiers are relative to the current ID-stack (so OpenPopup and BeginPopup needs to be at the same level).
IMGUI_API bool BeginPopup(const char* str_id); // return true if popup if opened and start outputting to it. only call EndPopup() if BeginPopup() returned true!
IMGUI_API bool BeginPopupModal(const char* name, bool* p_opened = NULL, ImGuiWindowFlags extra_flags = 0); // modal dialog (can't close them by clicking outside)
IMGUI_API bool BeginPopupContextItem(const char* str_id, int mouse_button = 1); // helper to open and begin popup when clicked on last item
IMGUI_API bool BeginPopupContextWindow(bool also_over_items = true, const char* str_id = NULL, int mouse_button = 1); // helper to open and begin popup when clicked on current window
IMGUI_API bool BeginPopupContextVoid(const char* str_id = NULL, int mouse_button = 1); // helper to open and begin popup when clicked in void (no window)
IMGUI_API bool BeginPopupContextItem(const char* str_id, int mouse_button = 1); // helper to open and begin popup when clicked on last item. read comments in .cpp!
IMGUI_API bool BeginPopupContextWindow(bool also_over_items = true, const char* str_id = NULL, int mouse_button = 1); // helper to open and begin popup when clicked on current window.
IMGUI_API bool BeginPopupContextVoid(const char* str_id = NULL, int mouse_button = 1); // helper to open and begin popup when clicked in void (no window).
IMGUI_API void EndPopup();
IMGUI_API void CloseCurrentPopup(); // close the popup we have begin-ed into. clicking on a MenuItem or Selectable automatically close the current popup.
@ -368,7 +368,7 @@ namespace ImGui
// Utilities
IMGUI_API bool IsItemHovered(); // was the last item hovered by mouse?
IMGUI_API bool IsItemHoveredRect(); // was the last item hovered by mouse? even if another item is active while we are hovering this
IMGUI_API bool IsItemHoveredRect(); // was the last item hovered by mouse? even if another item is active or window is blocked by popup while we are hovering this
IMGUI_API bool IsItemActive(); // was the last item active? (e.g. button being held, text field being edited- items that don't interact will always return false)
IMGUI_API bool IsItemVisible(); // was the last item visible? (aka not out of sight due to clipping/scrolling.)
IMGUI_API bool IsAnyItemHovered();